PAO provides online access to over 700 periodicals that are indexed in its companion database, Periodicals Index Online, which indexes over 6,000 journals and is accessible from the PAO homepage. PAO contains the full-text backfiles of over 700 journals, including many in foreign languages. It also indexes and links to articles in JSTOR.

Project MUSE is a unique collaboration between libraries and publishers providing 100% full-text, affordable and user-friendly online access to high quality humanities, arts, and social sciences journals from scholarly publishers.

This database provides one-stop access to more than 4,000 periodicals from one of the broadest, most inclusive general reference databases ProQuest has to offer. Search from a highly-respected, diversified mix of scholarly journals, trade publications and magazines covering over 150 academic disciplines.